Noble gases.
molecule
compound
When two elements join together it is called a chemical bond. Chemical bonds are formed through the sharing or transfer of electrons between atoms to achieve a stable electron configuration.
Americium is a very reactive metal and can react with the majority of other chemical elements.
Compound
A compound Two or more non metals joined together are called molecules. If a metal bonds with any other elements, it is called a formula unit. A compound is defined as two or more elements that are joined together by chemical bonds.
noble gases
When two elements join together they are called a compound. Water is one of the most common compounds, formed from hydrogen and water.
No, "join" is not a preposition. It is a verb that means to come together or connect. Prepositions are words that show the relationship between other words in a sentence. Examples of prepositions include "in," "on," "under," and "between."
No, it is not a preposition. It is a verb, and more rarely a noun.
Elements in Group 18 already have an octet of electrons, which is a full outer shell of 8 electrons. An octet of electrons makes the element stable, so it does not need to react with any other elements to gain or lose electrons.
Yes, this process is called fusion. It is used in stars and that is the reason we have elements above hydrogen which is the most basic and abundant of elements because it does not need to be made.